isaacphi/mcp-language-server

go install github.com/isaacphi/mcp-language-server@latest
Install a language server: gopls (go install golang.org/x/tools/gopls@latest), rustup component add rust-analyzer, npm install -g pyright, npm install -g typescript typescript-language-server, or clangd

Usage

• •Configure your MCP client with --workspace <path> and --lsp <server> (args after `--` are passed to the language server)
• •Example Claude Desktop config: { "command": "mcp-language-server", "args": ["--workspace", "/path/to/project", "--lsp", "gopls"] }
• •For Claude Desktop on macOS, set PATH/GOPATH/GOCACHE/GOMODCACHE env vars for Go

Key features

• ✓Tools: definition, references, diagnostics, hover, rename_symbol, and edit_file (reliable multi-edit on line numbers)
• ✓Language-agnostic — works with any stdio LSP server (tested with gopls, rust-analyzer, pyright, typescript-language-server, clangd)
• ✓Passes env vars and extra args through to the language server
• ✓Snapshot test suite that runs real language servers on mock workspaces

Caveats

• ⚠Beta software
• ⚠The language server must communicate over stdio
• ⚠Requires Go and the relevant language server installed on the machine